As far as I can remember the original proposed cast for Gilliams' GO included Robin Williams and Johnny Depp. Just can't figure out which one was supposed to be Azirafal and which one's Crowley As for Death there could be only one choice of course. Christopher Lee and no one else.

And if we're talking about Gilliams' ability let me just remind The Fisher King...

There's one thing I really can't understand. It's the whole 'the film would spoil it for me' approach. Well, there's a very simple solution to this problem - for crying out loud - do not watch! If the film existed you can still opt out from watching while as long as it doesn't exist I can't opt for watching. It's not so difficult to figure out which situation would leave more people happy :>

Depp'd good for both Crowley and Azirafal (I so wanted to type Falafel there ) - can't really see Williams as either really. Genies he's v. good at, but angels, fallen or otherwise - nope doesn't work!

How about Keanu Reeves and Depp - they're supposed to be similar aren't they though one of them would have to go blond of course...

"Some men see things as they are and ask why. Others dream things that never were and ask why not.” George Bernard Shaw

Warning: NEVER loan Good Omens to anybody. I've had to buy the damn thing three times already. Though I think the ebook may have solved that problem. Also, Kevin Smith's movie Dogma specifically credits Good Omens in the end credits. The movie is very funny itself.